Tool-sharpener



(No Model.)

G. H. STRONG.

T001. SHARPBNER. No. 277,957. Patented May 22,1883.

M PETERS. PhmaALimognpher. wamingxon. u. C.

y UNITED STATES GEORGE H. STRONG, OF CHICAGO, ILLINOIS, ASSIGNOR TO LAWRENCE W.

TATUM, OF CLEVELAND, OHIO.

'TOOL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 277,957, dated May 22, 1883.

Application filed March 19, 1853. (No model.)

To all whom it may concern:

Be it known that I, GEORGE H. STRONG, a citizen of the United States of America, resid-` ing at Chicago, in the county of Cook and State of Illinois, have inven ted certain new and useful Improvements in ,Tool- Sharpeners, of

. which the following, in connectie; with the accompanying drawings, is a speciu ation.

In the drawings, Figure l is a side view of 1o a tool- Sharpener 'embodying my invention. Fig. 2 is a top view of the same. Fig,.3 is a section in the plane of the line fr, and Fig. t

is a section in the plane of the line x Like letters of reference indicate like parts.

A represents the base or standard of a toolsharpener provided with my improvements. The upper part of this standard is forked, or consistsoftwo branchingand upwardly-extending arms, a and a'. The arm a has a removable extension, a,with a depending cylindrical stem, a, which freely enters a socket in the upper end of the arm a. y

B is a set-screw or binder for clamping orholding the stem a'" firmly in place.

C is a grindstone, and C is the grindstoneshaft. The shaft C has a bearing in the part a. The inner end of the grindstone -sbat't, which end carries the grindstone, is screwthreaded, and D D. are nuts run thereon, and the grindstone is clamped tirml y between these nuts, so as to be rotated with its shaft.

. E is a pulley wheel or-driver on the grindstone-shaft, and E is a pinion thereon.

F is a spur-Wheel, provided with a handle, F', and engaging the pinion E. The Wheel E and the spur-gear are not both essential, but may be used interchangeably for rotating the shaft, and when the spur" gear is not used the shaft may be provided with a handle, so that it may be rotated either by hand or by means of the wheel E.

G is a horizontal plate on the upper end of the arm a', and b is a dovetail groove in the upper-,side or face of the said plate.

His a sliding plate having a dovetail rib or extension, b', fitting into thev groove b, and c c are orossgrooves in the upper side or face of the plate H. is limited by means of astop-pin, d, on each end thereof, which pins strike a central fixed The movement of the plate El pin or part; but this movement may be limited in any well-known or suitable Way.

I is a sliding plate having on its lower side ribs, which enter the grooves c c; and e is a circular` slot in the said plate.

J is a plate pivoted at one corner to the plate I. This plate has on it the vertical dan ges or shoulders e' c.

K is a sliding block, having in its forward edge a groove,f.

L is a screw turning in a female screw in the shoulder e, and swiveled at its forward end to the block K.

M is a screw passing freely through the plate I and through the slot e, and N is a nut on the lower end of the said screw.

O represents an engravers tool. To use this sl1arpener,lplaoe the tool to be sharpened Y in the groovef, and turn the screw L until the tool is firmly clamped betweenthe block K and the shoulder c. I then set the plate J until the tool is presented at a properinclination 'to the stone, and tighten the screw M. As the plate I may be moved toand from the stone, I am enabled to hold the tool firmly againstthe stone and withdraw it ior inspection and as the plate H may be moved back and forth in a direction parallel to the stone, the tool may also be moved back and forth on the grinding face or side of the stone while the latteris being rotated. By this means the tool, whilebeing sharpened, will always be held at the same inclination to the stone, and may be set with facility to the proper angle. The tool, While being sharpened, may be held by its handle.

I? is a seat, on which I place a. whetstone, the grindstone being first removed by remov- 'ing the part a and the parts mounted thereto altogether. The whetstone may be held in its place by one hand While the tool is moved by the other, and the tool will be retained at the proper angle, as before described.

While I have shown an engravers tool in the drawings, it is obvious that other tools may be sharpened by the A means described. 95 The grindstone may be adjusted vertically, and also set at an angle in a horizontal plane by means ofthe screw B. It may also be removed, and another of different size-substituted.

Having thus described my invention, what I roo claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a tool-Sharpener, of the sliding block K and its adjusting screw, the pivoted plate J, provided with the shoulder e, and serving, in conjunction with the said block, as ajaw for holding the tool, the screw M and its nut N, and the sliding plate I, having therein the curved slot e, all arranged for operation together substantially as specified, and for the purposes set forth.

2. The combination, in a tool-Sharpener, of the grooved sliding block. K, the screw L, swivel-jointed to the said block, the pivoted plate AJ, provided Vwith the shoulder e', the clamping-screwM and its nut, the sliding plate I, having therein the curved slot e, and the sliding plate H, substantially as and for the purposes speeied.

3. The combination, in a tool-Sharpener, of 2o the stone C and its shaft, the sliding block K and its adjusting-screw, the pivoted plate J, the screw M and its nut N, the sliding plates H and I, the latter having therein the curved slot e, and the-tvvoarined standard A, with its 25 removable bearing a, substantially as and for the purposes specified.

GEORGE H. STRONG. 

